It should be clear that the actions of the black bloc reflect their politics. The actions in Toronto mirror those tactics used elsewhere. The tactics and politics regardless of their intent are inherently elitist and counter-productive. In fact they mirror the critique of reformism many on the left have. The NDP says vote for us and well do it for you, the black bloc says in essence the same thing  we will make the revolution for you. At best the tactics of the black bloc are based on a mistaken idea that the attacks on property and the police will create a spark to encourage others to resist capitalism, at worst they are based on a rampant individualistic sense of rage and entitlement to express that rage regardless of the consequences to others. The anti-authoritarian politic they follow is imposed on others. Very rarely will you see a black bloc call its own rally, instead the tactic is to play hide and seek with the police under the cover of larger mobilisations.